A man has been charged with shooting with intent to murder following the incident.

Mr Jennings said he was sick of police dumping troubled patients on security guards when guards do not have the powers to restrain and detain them.

Addressing the media afterwards, he said he was still shaken by last month's incident.

"It was frightening," he said.

"It was a pretty scary experience."

He said it had been "a long time coming" and "someone was eventually going to get hurt" given the emergence of ice use and the "type of clientele that is coming into hospitals".

"We need more help from the police instead of just dumping and running," he said.

He said he was "struggling to recover" from the events of that night, especially mentally.

His family have urged him not to return to the job, and he is still deciding whether he will go back.

"I don't know at this stage. I don't know if I could deal with that again, how far I was away from death," he said.

He said the situation was "scary for everyone including patients and staff".

"We just cross our fingers and hope everyone goes home safe," he said.

Union 'quietly confident' change is underway

The roundtable on Monday included the Health Services Union (HSU), the NSW Nurses and Midwives' Association, the Australian Medical Association (AMA) and the Australian Salaried Medical Officers Federation (AMSOF), NSW Health said.

Experts in mental health, drug and alcohol and senior managers from the public health system, representing some of the major local health districts, along with senior health department officials also attended.

Health Services Union secretary Gerard Hayes said he was disappointed NSW Health Minister Gillian Skinner and police did not turn up to today's meeting.

But he said he was "quietly confident" that things were moving in the right direction to make the state's hospitals safer places.

"I understand senior officials of the ministry of health will speak to the Minister this afternoon," he said.

"We hope in the very near future we will have some form of document that will address appropriate powers for security staff and enhanced numbers of security staff and a safer hospital for the community of New South Wales.

"It's vitally important that if security officers need to intervene with people who are not patients in the hospital, that they have the appropriate protections to ensure that the other visitors, staff and patients are protected by unruly individuals."

He said he was not given a reason for the Health Minister's absence.

"However I understand she is being briefed by those who were there and he's confident she is taking this matter seriously," he said.

"This is a matter that needs to be resolved as quickly as possible."

He said it also did not help that police were not at the meeting.

"Some of these matters we've dealt with today involved the police and it's only the police that can assist in the resolution with that. So them not being at the table has not been of assistance," he said.

The Opposition's health spokesman, Walt Secord, said he was happy to offer bipartisan support for any sensible measures coming out of the talks, but he said it was an oversight not to invite police.

Ms Skinner rejected the criticism over police not being invited to the roundtable.

"After the issues are identified today, then we will meet with NSW Police and work out whether the current protocols are enough," she said.